We are having a tumbled Travertine floor installed in our bathroom. The installer told us to research and purchase a sealer because the type he liked to use (oil based) was no longer available and he had none to recommend. I have been searching the web for info on sealers and am now completely confused. I want something that will protect the floor from toilet misses, water spills, high heel marks etc., all the things that happen in a bathroom. Any recommendations or just plain talk explanation on what to look for in a sealer.